// F1.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>

unsigned int fibo(unsigned int x)
{
    if (x == 0) throw 0;

    if (x == 1 || x == 2) {
        return 1;
    }
    else {
        return fibo(x - 1) + fibo(x - 2);
    }
}

int main()
{
    unsigned int x = fibo(6);
    printf("%d\n", x);
    
    return 0;
}